Just remove the zeroes.
12 : 1
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2 minutes = 120 seconds. So the ratio is 10 : 120 or 1 : 12
By dividing all numbers by 10 it is: 12 3 1
The gcf of the numbers is 15 so the ratio is 7 to 10
12 x 10 = 120
It is: 120 to 13